Interval meters are metering devices that store hourly consumption information. They are "read" daily - usually after midnight, by a telephone or other communication line.

Business customers with an interval meter are billed for their hourly energy consumption against the Hourly Ontario Energy Price, which is set hourly by the Independent Electricity System Operator (IESO).

For more information on the spot market and hourly pricing visit the IESO"s website athttp://www.ieso.ca/